Python cgi file

Save Article. Like Article. What is CGI? Common Gateway Interface also known as CGI is not a kind of language but just a specification set of rules that helps to establish a dynamic interaction between a web application and the browser or the client application. The CGI programs make possible communication between client and web servers. Whenever the client browser sends a request to the webserver the CGI programs send the output back to the web server based on the input provided by the client-server.

CGI programming is written dynamically generating webpages that respond to user input or webpages that interact with software on the server Working of CGI When a request is made by the client-server to the webserver, the CGI uses external script files to handle such requests. These files could be written in any language. The main objective of these script files is to retrieve the data from the database quickly and more efficiently.

These scripts convert the retrieved data into an Html format that sends the data to these web servers in Html formatted page. Thanks for using my script! This is useful logging or for authentication. The fully qualified name of the host making the request. Click this link to see the result Get Environment. You must have come across many situations when you need to pass some information from your browser to web server and ultimately to your CGI Program.

Most frequently, browser uses two methods two pass this information to web server. The GET method sends the encoded user information appended to the page request.

The page and the encoded information are separated by the? The GET method is the default method to pass information from the browser to the web server and it produces a long string that appears in your browser's Location:box. Here is the actual output of the above form, you enter First and Last Name and then click submit button to see the result. This packages the information in exactly the same way as GET methods, but instead of sending it as a text string after a?

This message comes into the CGI script in the form of the standard input. Here is the actual output of the above form. You enter First and Last Name and then click submit button to see the result. HTTP protocol is a stateless protocol. For a commercial website, it is required to maintain session information among different pages.

For example, one user registration ends after completing many pages. How to maintain user's session information across all the web pages? In many situations, using cookies is the most efficient method of remembering and tracking preferences, purchases, commissions, and other information required for better visitor experience or site statistics.

Your server sends some data to the visitor's browser in the form of a cookie. The browser may accept the cookie. If it does, it is stored as a plain text record on the visitor's hard drive. Now, when the visitor arrives at another page on your site, the cookie is available for retrieval. If this is blank, the cookie will expire when the visitor quits the browser.

This may be blank if you want to retrieve the cookie from any directory or page. If this field is blank, no such restriction exists. It is very easy to send cookies to browser.

Assuming you want to set UserID and Password as cookies. Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I'm trying to display the image I'm not sure why that is. The output looks like this.

I've tried many different solutions but none of them seem to work. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked today.